事故下辐射剂量评价的大气扩散模拟程序开发
发布时间：2024-06-03 18:51
核电厂发生事故的概率极低,但是一旦发生事故,释放出的放射性物质可能对附近的公众和安全工作人员造成严重的辐射损伤,因此需要及时评估放射性核素在大气中的扩散情况,以估计放射性物质对附近人员的照射剂量。利用估计的辐射剂量值可以评估辐射对电厂附近生物的损害以及潜在危险,从而制定合理的公众紧急疏散计划及其他应急计划。本文使用MATLAB程序开发了基于高斯烟羽模型的大气扩散模型计算代码,用于估计放射性核素空气浓度、总有效剂量当量(TEDE)、地面沉积浓度和地面照射剂量率。代码包含多个输入参数/变量,如放射性核素混合物及其活度、气象条件、释放高度和接收器高度、地表类型、大气稳定性等级、地表粗糙度、逆温层高度、烟羽的浮力和动量抬升、呼吸速率、烟羽和环境温度、烟羽可吸入部分和不可吸入部分的沉积速度。以K2/K3核电厂附近的地形和气象信息作为输入数据,源项参考福岛核电站事故相关数据。代码综合考虑了放射性核素在大气中的运输、沉积和扩散,计算了放射性活度时间积分空气浓度、地面沉积浓度、地面照射剂量率、浸没剂量值、吸入剂量值、地面照射剂量值以及总有效剂量当量。此外,代码还可输出人体器官剂量信息以及放射性混合物中...
【文章页数】：74 页
【学位级别】：硕士
【文章目录】：
摘要
Abstract
Chapter 1 Introduction
1.1 Significance of Research Topic
1.2 Basis of Dispersion Modeling
1.3 Research Objectives
1.4 Research Methodology
1.5 Thesis Outline
Chapter 2 Atmospheric Dispersion Modeling
2.1 Atmospheric Dispersion Modelling overview
2.2 Atmospheric Dispersion Models
2.2.1 Box Dispersion Model
2.2.2 Lagrangian Dispersion Model
2.2.3 Eulerian Dispersion Model
2.3 Gaussian Plume Model
Chapter 3 Gaussian Plume Modeling Code Development
3.1 Decay Rate
3.2 Depletion Factor
3.3 Material at Risk
3.3.1 Respirable/Non-respirable Source Term Component
3.4 Sampling Time
3.5 Deposition Velocity
3.6 Atmospheric Stability Classification
3.7 Terrain Types
3.8 Estimating σy and σz
3.9 Wind Speed
3.10 Momentum Plume Rise
3.11 Buoyant Plume Rise
3.12 Surface Roughness
3.13 Inversion Layer Height
3.14 Wet and Dry Deposition
3.15 Submersion Dose
3.16 Committed Effective Dose Equivalent
3.17 Total Effective Dose Equivalent
3.18 Breathing Rate
3.19 Dose Conversion Factors
3.20 Human Organ Dosage
Chapter 4 Gaussian Plume Modeling Code Algorithm
4.1 Input Data
4.2 Input File
4.3 Code Explained
4.3.1 Defining input variables
4.3.2 Formulas and Calculations
4.3.3 Defining Dose Conversion Factors
4.3.4 Creating Results Arrays
4.3.5 Displaying Results
Chapter 5 Gaussian Plume Model Verification with HotSpot
5.1 Time-integrated Air Concentration
5.2 Total Effective Dose Equivalent
5.3 Ground Deposition
5.4 Ground Shine Dosage Rate
5.5 Organ Dosage
5.6 Thyroid Dose and Bone Marrow Dose
Chapter 6 Conclusion and Recommendations
References
Acknowledgements
Publications during Study
Appendix A
Appendix B
本文编号：3988354
【文章页数】：74 页
【学位级别】：硕士
【文章目录】：
摘要
Abstract
Chapter 1 Introduction
1.1 Significance of Research Topic
1.2 Basis of Dispersion Modeling
1.3 Research Objectives
1.4 Research Methodology
1.5 Thesis Outline
Chapter 2 Atmospheric Dispersion Modeling
2.1 Atmospheric Dispersion Modelling overview
2.2 Atmospheric Dispersion Models
2.2.1 Box Dispersion Model
2.2.2 Lagrangian Dispersion Model
2.2.3 Eulerian Dispersion Model
2.3 Gaussian Plume Model
Chapter 3 Gaussian Plume Modeling Code Development
3.1 Decay Rate
3.2 Depletion Factor
3.3 Material at Risk
3.3.1 Respirable/Non-respirable Source Term Component
3.4 Sampling Time
3.5 Deposition Velocity
3.6 Atmospheric Stability Classification
3.7 Terrain Types
3.8 Estimating σy and σz
3.10 Momentum Plume Rise
3.11 Buoyant Plume Rise
3.12 Surface Roughness
3.13 Inversion Layer Height
3.14 Wet and Dry Deposition
3.15 Submersion Dose
3.16 Committed Effective Dose Equivalent
3.17 Total Effective Dose Equivalent
3.18 Breathing Rate
3.19 Dose Conversion Factors
3.20 Human Organ Dosage
Chapter 4 Gaussian Plume Modeling Code Algorithm
4.1 Input Data
4.2 Input File
4.3 Code Explained
4.3.1 Defining input variables
4.3.2 Formulas and Calculations
4.3.3 Defining Dose Conversion Factors
4.3.4 Creating Results Arrays
4.3.5 Displaying Results
Chapter 5 Gaussian Plume Model Verification with HotSpot
5.1 Time-integrated Air Concentration
5.2 Total Effective Dose Equivalent
5.3 Ground Deposition
5.4 Ground Shine Dosage Rate
5.5 Organ Dosage
5.6 Thyroid Dose and Bone Marrow Dose
Chapter 6 Conclusion and Recommendations
References
Acknowledgements
Publications during Study
Appendix A
Appendix B
本文编号：3988354
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